On Sunday, the balance in Dev’s savings account is $315.12. On Monday, he makes
withdrawals of $78.95 and $143.80. On Tuesday, he deposits $63.79. What is his
balance after he makes the deposit?
After making the withdrawals on Monday, Dev's balance is $315.12 - $78.95 - $143.80 = $92.37.
After making the deposit on Tuesday, his balance becomes $92.37 + $63.79 = $<<92.37+63.79=156.16>>156.16. Answer: \boxed{156.16}.